Air-mixing pipe for vapor-burners.



PATENTED JULY 5, 1904.

' J.STUBBERS- AIR MIXING PIPE FOR VAPOR BURNERS.

APPLICATION FILED DBO. 23, 1903.

NO MODEL.

51 mm" for atto bnkqa IINTTED STATES Patented July 5, 1904.

PATENT OEEIcE.

JOSEPH STUBBERS, OF COVINGTON, KENTUCKY, ASSIGNOR TO THE IN CANDESCENT LIGHT & STOVE COMPANY, OF CINCINNATI, OHIO,

A CORPORATION.

AIR-MIXING PIPE FOR VAPOR-BURNERS.

SPECIFICATION forming part of Letters Patent No. 764,159, dated July 5, 1904.

Application filed December 23, 1903. Serial No. 186,274. (No model.)

To all whmn it may concern:

Be it known that I, JOSEPH STUBBERS, a citizen of the United States, residing at Covington, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Air-Mixing Pipes for Vapor-Burners, of which the following is a specification.

My invention relates to a device for mixing air with gas for burners. It is primarily intended to be used with gasolene-gas generators for supplying incandescent burners.

The object of my invention is, first, to employ the mixer with a supply pipe which serves to deliver the carbureted gas to a large number of burners; second, to construct the mixing device so that it can be quickly and easily adjusted for the use of quite a number of burners and avoiding the necessity of regulating the device when one or two or three burners are turned on or ofi.

The features of my invention and mode of operation are fully set forth in the description of the accompanying drawings, forming a part of this specification.

In the accompanying drawings I have shown the mixer attached to the delivery-pipe of a gasolene-generator, the kind shown in Letters Patent No. 683.232, granted September 24:, 1901.

Figure 1 is a side elevation, partly in section, of my mixer attached to the generator and service-pipe in position for use. Fig. 2 is an enlarged central burner-section, showing the mixer in elevation and in relative arrangement with the service-pipe. Fig. 3 is a section on line m :r, Fig. 2.

A represents a gasolene-gas generator; A, the generator-pipe. v

B represents the needle valve rod; 6, the needle-valve for supplying gas to the mixer and service-pipe.

C represents the air-supply pipe, which is the preferred method of supplying the air to be mixed with the gas.

D represents the service or main'gas-supply pipe.

(0 represents the mixing-tube. In the pre- "ferred form of construction the upper end of this tube is made larger than the lower. Said pipe is supported so as to be revoluble, the lower end being projected into a circular opening on the air-pipe.

0: represents a collar fastened near the base of the pipe and serving as a vertical support therefor. (Z represents a stem affixed to said collar, so that the pipe may be turned in its annular seat. The mixer-pipe projects up into the service-pipe and is supported in what may be termed a stuffing-box to prevent the leakage of gas.

E represents the stufling-box, which surrounds the mixer within the service-pipe and preferably constructed as shown in Fig. 2.

F represents a sleeve having a circular flange 0 extending outwardly therefrom and provided with lugs 0'. Upon this sleeve is mounted a sleeve-plate it, to which service-pipe D is fixed. This plate is held in position upon the flange of the sleeve F by a clamping-ring Cr, which in turn is held in position by screws passing through the lugs e. The inner face or periphery of the sleeveF is screw-threaded.

H represents a cylindrical cap having screwthreaded engagement with the sleeve F and provided with an extended sleeve portion H for supporting the mixer-pipe a, closely fitting said mixer-pipe and provided with an orifice I. Said cap H contains an outwardlyextending annular disk It, thence extending vertically down and thence flanging outwardly, as at if, affording a handheld means for attaching and detaching the cap 70.

9 represents a packing for preventing the leakage of gas between the cap-sleeve and mixer-pipe.

J represents a cup-shaped cap having screwthreaded engagement with the cap H for securing the packing g in position.

The mixer-pipe is provided with an orifice K, (see Fig. 2,) which may be turned to register with the orifice I to form a free opening and exit at that point for the gas and air from the mixer-pipe into the service-pipe, or it may be turned to close said exit, in which position it is shown in Fig. 2.

Mode of operation: In the ordinary construction of service-pipes and burners it is usual to employ a mixing-tube with each burner. In the use of gasolene and gas generators where a building is to be lighted by service-pipessay to support sixteen or eighteen burncrs it has been found impossible hitherto to employ one mixing-pipe which Would do the mixing properly for the entire range of burners. It is also important to have the proper mixture of air and gas in order to get a perfect light. If too much air is mixed With the gas, the gas will not all burn. Gonsequently it escapes into the room, giving off an odor as Well as wasting the gas. If too little air is mixed with the gas, a good light will not be obtained As the number of burn ers in use on the service-pipe are varied from time to time, it is also necessary to vary the amount of air mixed with the vapor. It has 4 been found difficult where the mixer is used at the base of the service-pipe to regulate the mixing of air with the increase or decrease of one or more burners. It has been found by experience that increasing the length of the mixing-tube and in some cases increasing the size of the mixing-tube without increasing the length will increase the amount of air mixed with a given supply of gas. My present method relates to the use of a single mixing-tube, but practically to change the effective length of the tube proportionately to the changed conditions by making a bypass I K near the base of the service-pipe, so as to escape a greater or lesser amount of gas directly into the service-pipe at this point instead of forcing the gas all through the entire length of the mixing-tube, at othertimes using the entire length of the mixing-tube, as conditions require.

I have discovered by experience that the method of mixing air and gas shown and described can be quickly and readily adapted so as to properly mix air and supply with gas any usual number of burnerssay up to sixteen or eighteen, often employed on one service-pipe. The following are the conditions and means of regulation of such a mixing device: Say but three or four lights are to be used. If now the straight or lower part of the mixing-tube is seven-eighths of an inch in diameter, it is too large to draw suilicient air into it by the force of the vapor when same is delivered from the needle-opening with a pressure of about fifteen pounds to the square inch; but by lengthening the mixing-tube the entraining of the air is materially increased. 1 therefore close the by-pass I R. If now the burners are to be increased, say, up to about ten, an additionalamount of gas must be supplied, and if the entire length of the mixingpipe is employed too much air will be entrained in with the gasconsequently a poor light and odor in the room; but by turning the mixing-pipe so as to open partially or eni tirely the by-pass I K the requisite amount of air-mixture can readily be obtained. If nearly the entire or all of the number of lights are to be used, of course an increased supply of gas is required, and the needle-valve will be turned to give such supply. If nearly the entire amount of lights are on and the by-pass partially opened, too little air will be admitted to give a good light, because the mixing-tube is too small in diameter; but by closing the by-pass I K and using the entire length of the mixing-pipe the requisite amount of airmixture is obtained. Hence by this method any desired number of lights may be employed and a single mixer used and good lights obtained.

It will be observed that the stem (Z serves as an indicator to show the position of the bypass, and the attendant will quickly learn to adjust the by-pass to any change of conditions required, and this index or stem is a very cligible adjunct of this invention. The use of the by-pass is, in effect, changing the efficient length of the mixing-tube and the equivalent of a telescopic tube, With means for actually changing'the length of such tube; but the form shown is simpler and just as efficient.

Having described my invention, 1 claim- 1. In combination with a service-pipe, an air mixing tube supported and projecting therein having a fixed mouth and provided with a by-pass within the service-pipe and means for regulating the by-pass, substantially as described.

2. In combination with a service-pipe, a mixing-tube projecting into said pipe and provided with a by-pass Within said pipe, means for securing and sealing said tube in the sup ply-pipe and means for regulating the bypass, substantially as described.

3. In combination with a service-pipe, a gasmixing tube projecting into said pipe and revolubly seated therein and provided with a by-pass opening leading into the service-pipe, a shutter within the burner-pipe, means for sealing the mixing-tube in the burner-pipe, and means for turning the burner-pipe to regulate the by pass as shown.

4. In combination with a service-pipe, a gas and air mixing tube projected therein and sealed within the service-pipe, said tube being provided with a by-pass opening, means for regulating the by-pass, the air-supply tube oncompassing the mouth of the mixing-tube, and a gas-generator and needle-valve opposite the said mixing-tube, substantially as described.

5. In'combination with a service-pipe of a generator, a gas and air mixing pipe having its mouth fixed opposite the outlet of the generator and provided with a1: propriate means for varying the effective length of said mix ing-pipe within the service-pipe, substantially as described.

6. In a vapor-generator, a gas service-pipe, a mixing-tube discharging into said pipe and mounted in said pipe and provided With an open end opposite the needle-valve and means for regulating the by-pass, substantially as de scribed.

In testimony whereof I have hereunto set my hand.

JOSEPH STUBBERS.

Witnesses:

OLIVER B. KAIsER, LUISE BECK. 

